W9 - Deep Flexor Muscles Of The Wrist

Question 1

Name the three muscles that make up the deep flexor compartment of the wrist

Answer 1

Flexor digitorum profundus
Flexor pollicis longus
Prontor quadratus

Question 2

Name the maximum distal attachment sites for the flexor digitorum profundus muscle

Answer 2

Proximal
Medial side of coronoid process
Anterior and medial surface of ulna
Anterior half of interosseous membrane

Distal
Base of Palmer surface of distal phalanx of each finger

Question 3

Name the nerve that supplies the flexor digitorum profundus muscle

Answer 3

Anterior interosseous nerve C7, 8, T1
Ulnar nerve C8, T1

Question 4

What action is the flexor digitorum profundus muscle responsible for?

Answer 4

Flexion at the DIP, PIP, MCP and wrist

Question 5

Name the proximal and distal attachment sites for the flexor pollicis longus muscle

Answer 5

Proximal
Anterior surface of radius and adjacent interosseous membrane

Distal
Palmer surface base of distal phalanx of the thumb

Question 6

What nerve supplies the flexor pollicis longus muscle

Answer 6

Anterior interosseous nerve C7 to 8

Question 7

What action is the flexor pollicis longus muscle responsible for

Answer 7

Flexion at the CMC, MCP & IP joints

Question 8

Name the proximal and distal attachment sites for pronator quadratus muscle

Answer 8

Proximal
Oblique ridge on anterior surface of the distal fourth of the ulnar

Distal
Lateral border and an anterior surface of distal fourth of the radius

Question 9

What nerve replies the pronator quadratus muscle?

Answer 9

Median nerve C7 to 8 (interosseous branch)

Question 10

What action is the pronator quadratus muscle responsible for?

Answer 10

Pronation of the forearm at the distal radioulnar joint
Dynamic stabiliser of distal radioulnar joint